Boiler casing



T. C ERVIN BOILER CASING Jan. 1, 1935.

Filed Dec. 28, 1953 3 Sheets-Sheet 1 INVENTOR f 6 w 7 B J an Qm N a MN Q I Ll a f. EV 1 k m mv MN m I. w T L." Wm Q A ORNEY Ja n. 1, 1935. Q T 1,986,258

BOILER CASING Filed Dec. 28, 1935 s Sheets-Sheet 2 INVENTOR A ORNEY Jan. 1, 1935.

Filed Dec. 28, 1933 5 Sheets-Sheet 5 INVENTOR MXM A ORNEY UNITED {sTATEs I B ER S N i I Thomas CQlirvin, Houston, Tex.

' Appli cation-Decenrberfill, r933, Serial No. #04353- I 3- Claims.

The objects of. the present invention. are to provide an insulating casing for boilers, which can be readily applied. or removed, which will be efiective' as an insulation and protection for the boiler, which will be durable and lasting and which can be made up at a reasonable cost and shipped out from the placeof manufacture in a form ready to be applied to boilers then in' service.

These and other. desirable objects are attained by the novel'feature's of construction, combina tions and relations of, parts hereinafter described, illustrated and broadly covered in the claims.

The drawings accompanying and forming part of the specificationillustratepractical and preferred embodiments of the invention, but it is to be understood that'the structuremaybe modified. and changed all within the true intent and,

broad scope of the invention. w I

Fig. 1 is a side elevation showing the invention as applied to a boiler .of' typical, form. 3 Fig. 2' is'anend View, on; a larger scale looking at thelfirebox end of theboiler. Fig. 3 is a verticalsectionaliview of the casing as on substantially the plane of line 3--3- of Fig.1. f Figs. ,4, .5, .6, 7, and 7a are broken enlar'ged sectional views substantially as on lines 4-'-4, 5-5,.6-6, 7-7 and la-flu of Fig. I.

Fig. .8 isja horizontal sectional view otthe domecovering portion of the casing as on line 8-8 of Fig.1. j

Fig. 9 is an interior view of one of the dome half covers. I

Fig. 10 is an interior perspective viewof the left hand top cover section forthe wagon top.

Figs. 11 and 11a areifragmentary detail views illustrating a special form of anchorages for the screen or webbing that holds the insulation within the cover plates. V

Fig. 12 is a broken horizontal sectional View of the wagon top side and throat sheet cover sections, substantially as on line 1212' of Fig; 3.

Fig. 13 is. an interior view of one of the throat" sheet cover sections. p Fig. 14 is a broken detail-of the hook construction for coupling opposite sections together beforethe banding strapsLare-applied.

Fig. 15 is a broken detail :Of'llhe tighteningmeans fort-he straps or bands. 7'

In' the ,form of t the inventionherein. disclosed,

and at. the bottom of the boiler. These further aredivided into front and middle course barrel cover sections and wagon top cover sections.

The front, top barrel cover sectionsaredesignatedll'l; and ,theiront lower barrel cover sec tio'ns'18; the. top middle course sections 19; the lower middle-course sections 20; the upper. wagon top sections 21 and the side wagon top' sections. 22. The throat sheetcover sections are designated 23 and the dome half cover sections 24.- I

These sections ior an average boiler areoi a practical and. convenient size .for manufacture and shipment-and while light .enoughior easy handling are psufiiciently'rigid-and firm for all practical purposes.

Q'I'hevarious cover sections arealik that 1 eachconsists of a hollow self-supporting shell containmg ablanket of insulating material. Similar reference-characters therefore are here used in describing thesev various cover units.

Each .cover unit consistspia.;cover sheet 25, outlined t that partof, .theboiler to-whichit is to .be. applied and. held to the app oximate shape of that portion. ot tbe boiler by ribslor internal flan es 26, aboutthe-edgles-of the same. ;'-I'hese inwardlyextending flanges in addition to giving form to the sheet covering-provide the hollows within the sheet, receiving the, insulating material 27. 1 Mineral wool or; the like, may be used as the insulating material. 1 To holdlsuch insulationinplaoe, expandedmetal lath 28, woven wire fabric, or the like, is laid. over the same and weldedor otherwise secured at its edges tothe retaining. flanges .26. This zsoreen or open-work retainer maybe supported, and-keptr from sagging. by intermediate strips or. ribs: 29,, laid .over the sam tgenera}. parallelism to the a sheet. and welded .or otherwise secured to the edge flanges asl indicated at sa,1ng s.io.a e1a. I

. holding fabric .may-besecured at intermediate points. .by .Ishort studs 'or wires trim/shown in Figs. 11, and 11a. as welded to the inner surface orthe sheetatfiiifi,LandiaS-cirtending.throughwthe insulation :and' the wire the latterlatfifi. V I I g The insulation holding and .supporting wire fabriciorms a parallelreinforcement to the cover sheet and with the interposed layer 0f insulation,- rnaterially rein-forces and. .stifiens the structure, so. thatjtmay be readilyhandled as a .unit.

To make the casing, waterproof, the joints between cover sectionsare, lapped, whererequired, by fianges34, of one-section overlying the edges of an adjoining; -section, These overlapping flanges may beprovidedsasparticularly shown in fabric and clinched over -18, have theregistering-recesses 36, in their,meet-' ing edges for feed water connections, Fig. 1, the upper wagontop sections 21 and throat sections 23, have recesses 37, for steam fittings, the dome. half cover sections have meeting recesses 38, 39, in their side and top edges for steam connections. For steam dome, manhole and handholepurposes, openings 40, 41, 42, are provided in the middle course sections 19, barrel sections 17, .w'agon top and throat sections 21,, 23, and these in eachcase are lined with flanges 43, corresponding in' effect to the manner in'which the edge flanges 26, are indented to form the recesses 36,, 37, 38,39.

The manhole and handhole openings ar'eclosed by removable covers 44, 45, shown as fitted over the manhole and handhole bolts 46, 47', and as detachably held by theextranuts 48, 49, engaged on the projecting portionsof said bolts, Figs. 4 i

The coversectionsare secured in their cooperating overlapped relation on the boiler by encircling banols or straps 50, overlapped at their ends as indicated at 51, Fig. 15, andadjustably held together by bolt fastenings 52, engaged with angles '53,"on' theyopposite end portions of the straps. T v In some instances, or in some places, the s'ec+ tions may be secured together by bolts 54, passed through ou'tstruckylugs or flanges 55, as shown for the wa'gontop sections in'Figs. 1, 2 and'lO; Primarily, a's'a'n aidin assembly,.the cooperate ing or companion sections 'mayhave interengaging portions'which will hook together andjpartly hold the'sections while the securing bands are being'locatedfl'and adjusted. V This-feature is shown particularly in-Figsb'loand 14 where hooks 56, are shownstruck out from the flange 26, at the edge 0t one section to'pass through and interlock with slotted portions5'i, in-the edge flange of theadjoining sectioni When so engaged, the over1apping' flanges=-'34 of the sections willhold them in this relation,- it being noted that after passing through theslotsythe hooks will be shifted into interlocking relation; as the cover sections are brought into proper alignment.

A special feature, illustrated particularly in Figs; 1, 3, 4 and'5, is that the casing is supported with a small air space 58, between the insulation and the boiler, which materially increases the efiectiv'eness of the insulation and also eliminates the possibility of any corrosive'action be-. tween the insulation and boiler plates. I This spacing of thecasing out or contact with the plates iseffected by resting'it" on the projecting rivet heads 59, of the boiler shell, the insulation retaining mesh 28, engaging these rivet heads and supporting the'cover' sections'ofl the boiler and with but a'minimum thermal conducting relation between the boiler andcove'r sections; The showing of the boiler'in Fig. 3 is'incompleta'only the outline of the-same being indicated for'the purpose of illustrating the air jacket. l

' For positioning and securing" purposes, thefront endiflange's of the barrel sections 17, 18, may be extended inward 'to' meet the-smoke box portion of the boiler as at 60, Fig. "l, and the rear end flanges of the wagon top sections may be extended inwardly as at 61, Figs. 2 and 4, over the firebox end of the boiler. Also, the front end flanges of the side wagon top sections 22, may be extended inwardly as at 62, Figs. 3 and 12, over the front end of the firebox and lapped over the throat sheet sections 23, to aid in holding the latter in position. The lugs 55 on thewagon top and throat sheet sections may be formed as integral outturned ends of these' 'widened flanges 61 and 62, substantially as indicated.

' The cover sections are readily cut, shaped and assembled from stock materials and when made up, constitute each a firmly braced insulating blanket section, which can be shipped to the location of aboiler and applied without disturbing the boiler or its various connections. In case of necessity, any or all sections may be readily removed and the casing as a whole may, if desired, be successively used on different boilers. The casing is tight against the weather and specially adaptedfor outdoor or unprotected boiler installation. The insulation may be of any'desired thickness, but because of the air space provided between the insulation and the boilersurface, it need not be so heavy forequal insulating results as if it were in direct contact with the boiler shell. The casing is strongand rugged enough to stand vibration and rough usage, such as encountered in the oil fields where protection of this character is particularly required In the form illustrated, there are only sixteen cover sections, four quarter segments for the front barrel portion, four quarter sections for the middle course, two top quarter sections and two side sections for the wagon top, two segments for the throatsheet and two half sections for the dome. The rearwardly projecting flanges, of the front sections overlap and hold the front edges of the middle coursev sections, the front edges of the wagon top side sections overlap and hold the throat sheet sections and the dome sections tojanextent overlap and hold the top middle coursesections, so that the sections brace and hold each other independently of the encircling bands. .Thehandhole and manhole cover plates also aid in fastening the cover sections down on the boiler shell. H

While the practical forms of the invention illustrated are preferred, it will be realized that changes may be made therein within the broad coverage of the claims following.

What is claimed is:

1. A removable and replaceable, sectional in sulating boiler casing, comprising segmental cover sections lined with insulatingmaterial and meet ing on longitudinal and transverse lines, longitudinally and transve'rselyextending overlapping flanges on certain of the cover sections covering the longitudinal and transverse joints between the cover sections and bands encircling'the segmental cover sections, securing the same together in said longitudinally and transversely overlapped relation, said cover sections having interlocking hook elements at the meeting edges of the'same and inside the overlapping flanges between the joints. a

2. In combination-with a boiler having projecting bolts for handhole covers and the like, a structurally independent sectional insulating casing removably applied over said boiler and having openings for said handhole covers and the like, removable covers forsaid'casing openings engaged over said casing sections'and fittedover said bolts and nuts engaged on said bolts removably securing said casing covers in position over said handhole covers and the like.

3. In combination with a boiler having barrel, wagon top and dome portions, a removable and replaceable sectional insulating casing therefor, comprising top and bottom barrel cover sections, top and side wagon top cover sections and dome cover sections and bands encircling said barrel,

wagon top and dome cover sections in covering position on the boiler, said cover sections engaging in abutting relation and companion sections having on abutting surfaces hooks and seats for said hooks, whereby the sections are positively held against separating movements.

4. In combination with a boiler having barrel, wagon top and dome portions, a removable and replaceable sectional insulating casing therefor, comprising top and bottom barrel cover sections, top and side wagon top cover sections and dome cover sections and bands encircling said barrel, wagon top and dome cover sections in covering position on the boiler said cover sections having weather excluding overlapping flanges at the joints between the same, said cover sections engaging in abutting relation and companion sections having on abutting surfaces hooks and seats for said hooks whereby the sections are positive- 1y held against separating movements.

' 5. In combination with a boiler having project ing fittings, a sectional insulating boiler covering applied thereover, certain of said cover sections having openings therethrough for the boiler fittings, covers for said openings and means on said boiler fittings securing said covers in position closing said openings and hold said cover sections in position on the boiler.

6. A sectional insulating boiler casing, comprising cover sections having inwardly extending flanges, boiler insulation within said cover sections between said flanges, insulation retaining screen overlying said insulation, straps overlying said screen and secured to said inwardly extending flanges and flanges projecting at the edges of certain of said'cover sections and overlapping the edges of adjoining sections.

7. A sectional insulating boiler casing, comprising cooperating insulating cover sections having overlapping edge portions, hooks and keepers for the same on adjoining edges of said cover sections beneath the overlapping edge portions of the same for connecting said cooperat ing overlapping edge portions to facilitate the placement of same on a boiler and encircling bands for securing and binding together said thus connected cover sections in final position on a boiler.

THOMAS C. ERVIN. 

